A Feast for Crows

Sybell and her children were kept inside Riverrun during the siege. When Edmure surrendered Riverrun to Ser Jaime Lannister, Sybell sat down with Ser Jaime and told him of her complicity in the death of Robb Stark. She explained how she had made sure there was no heir from her daughter's union and how she had been promised lords or heirs as prospects for her son and daughters. Jaime informed her that the bride that had been promised from Casterly Rock for her son Rollam was Joy Hill, the bastard daughter of Gerion Lannister and that her brother Rolph was the newly made Lord of Castamere, thus giving the Spicers an actual seat. Sybell was upset that her eldest son was set to marry a bastard. Sybell left with her daughter the next morning for the West.[3]